Twitter has said it has a corrected a bug that entered its systems November 2013, which allowed unapproved users to read tweets coming from protected accounts, UPI has reported. The online microblogging service said the bug, which affected 93,788 protected accounts, had been fixed, unapproved users had now been removed and users affected by the bug had been notified via email. “While the scope of this bug was small in terms of affected users, that does not change the fact that this should not have happened. We’ve emailed each of these affected users to let them know about this bug and extend our whole-hearted apologies,” Twitter’s director of information security, Bob Lord, said in a blog post.